Method for treating a panel of wood-based material and building panel with a core of wood-based material

Abstract

A method for treating a panel of wood-based material to achieve an adhesive-free surface after a decoration ( 2 ) has been printed onto at least an upper side of the panel of wood-based material, is distinguished by the fact that a cellulose-free top layer ( 3 ) of melamine resin with mixed-in glass beads ( 5 ) is applied to the decoration ( 2 ), and this top layer ( 8 ) is dried before a wear-resistant layer ( 6 ) is applied to the top layer ( 8 ).

The invention claimed is: 
     
       1. A method for treating a woodbase material board in order to achieve a tack-free surface following printing of a decoration onto at least one top face of the woodbase material board, comprising applying to the decoration a cellulose-free outer layer of melamine resin into which glass beads have been mixed, drying the outer layer resulting in the tack-free surface at an intermediate stage of production, and applying an antiwear layer to the outer layer, wherein the drying is performed prior to the applying of the antiwear layer. 
     
     
       2. The method as claimed in  claim 1 , further comprising actively drying the outer layer. 
     
     
       3. The method as claimed in  claim 1 , wherein the glass beads are used in silanized form. 
     
     
       4. The method as claimed in  claim 1 , further comprising applying the melamine resin/glass bead mixture in an amount of 10 to 30 g/m 2 . 
     
     
       5. The method as claimed in  claim 1 , further comprising applying the melamine resin/glass bead mixture in an amount of 12 to 20 g/m 2 . 
     
     
       6. The method as claimed in  claim 1 , wherein a fraction of glass beads in the mixture is 12 to 16 wt %. 
     
     
       7. The method as claimed in  claim 6 , wherein a diameter of the glass beads is in a range from 60 to 90 μm. 
     
     
       8. The method as claimed in  claim 6 , wherein a diameter of the glass beads is in a range from 70 to 110 μm. 
     
     
       9. The method as claimed in  claim 1 , further comprising applying a primer layer composed of 15 to 40 g/m 2  of an aqueous melamine resin to the top face of the woodbase material board. 
     
     
       10. The method as claimed in  claim 9 , wherein the woodbase material board is a woodbase material/plastic mixture. 
     
     
       11. The method as claimed in  claim 9 , further comprising applying a base of an aqueous paint to the primer layer. 
     
     
       12. The method as claimed in  claim 11 , wherein the base is a white base having a application of 20 to 30 g/m 2  of the aqueous white paint. 
     
     
       13. The method as claimed in  claim 11 , wherein the decoration consists of a plurality of successively applied decorative prints. 
     
     
       14. The method as claimed in  claim 13 , wherein the decorative prints is applied by offset printing or a digital printing. 
     
     
       15. The method as claimed in  claim 13 , wherein the outer layer consists of an aqueous melamine resin/glass bead mixture with an application quantity of 10 to 30 g/m 2 . 
     
     
       16. The method as claimed in  claim 15 , wherein the glass beads are mixed into the resin have a diameter of 60 to 110 μm. 
     
     
       17. A method for treating a woodbase material board in order to achieve a tack-free surface following printing of a decoration onto at least one top face of the woodbase material board, comprising applying to the decoration a cellulose-free outer layer of melamine resin into which glass beads have been mixed, drying the outer layer, applying an antiwear layer to the outer layer, applying a primer layer composed of 15 to 40 g/m 2  of an aqueous melamine resin to the top face of the woodbase material board and applying a base of an aqueous paint to the primer layer, wherein:
 the drying is performed prior to the applying of the antiwear layer, 
 the decoration consists of a plurality of successively applied decorative prints, 
 the outer layer consists of an aqueous melamine resin/glass bead mixture with an application quantity of 10 to 30 g/m 2 , 
 the glass beads are mixed into the resin have a diameter of 60 to 110 μm, and 
 the drying of the outer layer is actively drying the outer layer, and the antiwear layer is composed of a melamine resin/corundum/cellulose fiber mixture applied in an amount of 30 to 50 g/m 2 . 
 
     
     
       18. The method as claimed in  claim 17 , further comprising pressing the woodbase material board in a short-cycle press to form woodbase material panels. 
     
     
       19. The method of  claim 18 , further comprising stacking up to 1000 woodbase material panels one on top of another without them sticking to one another. 
     
     
       20. The method of  claim 19 , wherein the stack is stored preferably at 25° C. and at atmospheric humidity of 40% to 60%. 
     
     
       21. The method of  claim 19 , further comprising destacking of the stack at 35° C.